Grade Listed Properties: Survey Challenges

A listed property may have been repaired, extended and altered many times over its lifetime. Original materials can sit alongside much newer work, while changes made decades ago may still affect how the building performs today.

For a surveyor, that means looking beyond the condition of individual elements and understanding the building as a whole. How was it originally constructed? What has changed since? Are later materials working properly with the older fabric? Those questions can make a listed property more complex to assess than a modern home.

Challenges of Grade Listed Properties

Grade I, Grade II* and Grade II listed properties are protected because of their architectural or historic interest. That status can affect both what owners are allowed to change and how repairs need to be approached.

Some of the main considerations include:

• Conservation restrictions: Alterations may require listed building consent, even where similar work to an unlisted property would be relatively straightforward.
• Traditional materials: Lime plaster, lime mortar, timber framing, stonework and thatch behave differently from modern materials and need to be treated accordingly.
• Previous alterations: Extensions, removed walls, replacement windows and other changes may need closer attention, particularly where it is unclear when the work was carried out or whether the correct materials were used.
• Specialist repairs: Work to historic buildings may require traditional materials and contractors with the right experience, which can affect the scope and cost of repairs.

Previous Alterations and Listed Building Consent

One of the things a surveyor will be looking at is how the property has changed over time. Listed buildings are rarely completely untouched, and it is common to find later extensions, altered layouts, replacement windows or changes to roofs and internal finishes.

Some alterations to a listed building require listed building consent. Where work appears to have been carried out in the past, your surveyor may recommend that your solicitor checks the available consents and records as part of the legal process.

That can be particularly important where an alteration has affected the structure or original fabric of the building. A removed wall, altered chimney breast or replacement roof covering, for example, may have implications beyond the appearance of the property.

Why a Level 3 Building Survey?

Many listed properties are best suited to a Level 3 Building Survey because of their age, construction and the likelihood of previous alterations.

The surveyor will inspect all accessible areas of the property and consider the condition of what they find in the context of the building itself.

Take damp as an example. Moisture in a traditional solid wall cannot always be approached in the same way as damp in a modern cavity wall. External ground levels, ventilation, previous repairs and modern finishes may all have a bearing on what is happening.

Cracking needs similar judgement. Older buildings often show signs of movement that happened a long time ago and has since stabilised. The surveyor will look at the pattern of cracking and any other evidence around it to decide whether further investigation is needed.

Where conditions allow, drones can also help inspect roofs, chimneys and other areas that are difficult to see properly from ground level.

Common Issues in Listed Properties

The defects found will vary from one building to another, but certain areas often deserve closer attention.

• Damp and moisture: Traditional buildings were generally designed to allow moisture to move through the structure. Later materials such as cement render or gypsum plaster can sometimes interfere with that process.
• Structural movement: Uneven floors, cracks and walls that are out of plumb are not unusual in older properties. The important question is whether the movement is historic or there are signs that it is continuing.
• Previous repairs and alterations: Modern materials or poorly considered changes can affect the original construction and sometimes create problems elsewhere in the building.
• Asbestos: Later twentieth-century alterations may have introduced materials containing asbestos, even where the original building is much older. Suspected materials may need specialist testing.

When Modern Repairs Cause Problems

Older buildings were generally constructed using materials that work differently from those used in modern homes. Solid walls built with lime mortar, for example, are intended to allow moisture to move through them.

Problems can develop when later repairs change the way that construction behaves. Cement render, modern plaster, impermeable paints or inappropriate pointing can trap moisture rather than allowing it to escape.

That can make diagnosing damp in a listed property more complicated. Treating the visible symptoms without understanding the construction can leave the underlying cause untouched, and in some cases make the problem worse.

A Level 3 Building Survey gives the surveyor more scope to consider those relationships rather than looking at individual defects in isolation.

Repairs Can Be More Specialist

Where work is needed, the solution may be different from the one you would use on a modern property.

Repairing historic masonry might mean matching an existing lime mortar rather than using cement. Timber framing may need specialist assessment, while work to thatch, traditional roofing or decorative plaster can require contractors with experience of historic buildings.

Listed status can also affect what changes are permitted, so a seemingly simple repair or improvement may need more thought than expected. The survey can help identify areas where specialist advice is likely to be needed and give you a better idea of what ownership of the property may involve.

The Novello Advantage

Our surveyors only take on a limited number of inspections each week, giving them more time to inspect the property properly and consider what they find.

That can be especially useful with a listed building. An old repair may need more investigation, an area of damp may need to be understood in the context of traditional construction, or a previous alteration may raise questions that would not come up in a more straightforward property.

The report explains the findings in the context of the building and makes clear where further investigation or specialist advice is recommended.

Clients can also speak directly to their surveyor once the report has been issued, so anything that is unclear can be discussed with the person who inspected the property.

What Happens After the Survey?

A listed property can produce a longer or more detailed survey report simply because there is more history to understand. That does not mean every finding represents a serious problem.

What matters is understanding which issues are part of the normal ageing of the building, which need maintenance and which warrant further investigation.

At Novello, clients can speak directly to their surveyor after receiving the report. With a property where several issues may be connected, that conversation can be particularly useful for putting individual findings into context and understanding where attention should be focused.

Surveying a Listed Property

A listed building can carry evidence of hundreds of years of use, repair and change. A Level 3 Building Survey helps put those changes into context and identify where defects, previous alterations or specialist repairs may need further attention.